By the hundreds, news media correspondents from across the world came to Philadelphia to cover the Democratic National Convention.

Most were in Cleveland for the Republican National Convention last week.

For Europeans, Donald Trump's talk of abandoning NATO commitments has become a primary focus, along with explosive statements like wanting Russians to hack Hillary Clinton's e-mail, statements he now describes as sarcasm.

"That is definitely a huge topic when a presidential candidate from one party comes up with de facto, already asking another country to spy on his own competitor," said Lenka Kabrhelova, Czech Public Radio.

"So we we're horrified when we heard some of the statements that maybe the United States may not be so committed to Article 5 of NATO," said Marcin Wrona, TZN Poland.

From Western Africa, where U.S. immigration policies are a primary focus, Daniel Houegban of Liberte-TV says, "Donald Trump or Hillary Clinton, which one is going to focus on a better Africa, and have a good relationship with African leaders like President Obama did?"

PHOTOS: The 2016 DNC in Philadelphia

From the Arab states, where U.S.-style elections are culturally a world apart, Amina Sriri of Sky TV-Arabia told us, "We try to explain to the Arabic audience, for example, they don't know what is a delegate."

From South Korea, a U.S. ally, the keen interest in the White House never wanes for a minute.

"POTUS, President of the United States, the world leader. The policy of the United States affects all of the world including my country," said Gizin Sung Shim of Yonhap News Agency.